and Neutral Hills
Buttes is a group of low hills 15 kilometres south of the hamlet of Monitor,
east of Coronation. It is an isolated pocket of badlands about two kilometres
long and 800 metres wide, and is probably North America's largest and
best exposed site of glacially deformed bedrock. The folds and faults
here are formed by the push from advancing glaciers, and provide excellent
information about the direction of flow of glaciers during the last Ice
rocks forming Mud Buttes are weakly cemented sandstones and mudstones
deposited around 75 million years ago during the Late Cretaceous Period.
These soft rocks were bulldozed into faults and rounded, toothpaste-like
folds by the immense weight of an overriding glacier.
advancing glacier tore loose large sheets of bedrock and shoved them 5
kilometres to the southwest, stacking them against each other to produce
Mud Buttes. Measurements of the folds and faults, plus the presence of
igneous and metamorphic rocks in nearby glacial sediment indicates that
the glacier advanced from as far away as the Canadian Shield. That's at
least 700 kilometres!